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Preparation method of triazolone

A technology of triadone and methyl, which is applied in the field of tridone preparation

Inactive Publication Date: 2015-03-18
QINGDAO HAOLITE BIOLOGICAL PESTICIDE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Triadimefon is highly active against some bacteria in vivo, but the in vitro effect is very poor

Method used

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Embodiment 1

[0014] The first step, the preparation of triazole, pass ammonia gas into formic acid to obtain ammonium formate, and then react with hydrazine hydrate to obtain 1,2,4-triazole;

[0015] The second step: the preparation of chloropinacolone isoamyl alcohol is dehydrated under the catalysis of activated alumina and transpositioned to generate isoamylene;

[0016] The third step: 2-methyl-1-butene and 2-methyl-2-butene are added with hydrogen chloride to generate chloropentane. Then react with formaldehyde in acidic solution to generate pinacolone, and in the presence of solvent, lead to chlorine to obtain chloropinacolone;

[0017] The fourth step: chloropinacolone and p-chlorophenol in the presence of potassium carbonate, 1-(4-chlorophenoxy) pinacolone is obtained in toluene solvent, and then chlorinated with sulfuryl chloride to obtain 1 -(4-Chlorophenoxy)-1-chloropinacolone. Then synthesize triadimefon with 1,2,4-triazole, the yield is 88%.

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PUM

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Abstract

The invention discloses a preparation method of triazolone. Triazolone is a triazole fungicide which is high in efficiency, low in toxicity, low in residue, long in lasting period and strong in internal absorption performance. Triazolone has very strong activity to some pathogenic bacteria in a living body, is very poor in in-vitro effect, has stronger activity to hyphae than the activity to spores, can be conducted in plant bodies after being absorbed by each part of a plant, has the effects of preventing, removing, treating and fumigating rust diseases and powdery mildew, and the like, and also has the effects on various crop diseases such as northern corn leaf spot, barley leaf blotch, wheat leaf blotch, pineapple black rot, maize head smut and the like.

Description

technical field [0001] The invention belongs to the technical field of pesticide manufacture, and in particular relates to a method for preparing triadone. Background technique [0002] Triadimefon is a triazole fungicide with high efficiency, low toxicity, low residue, long-lasting effect and strong systemic absorption. Triadimefon has strong activity against certain pathogens in vivo, but its in vitro effect is very poor. The activity of mycelia is stronger than that of spores. After being absorbed by various parts of the plant, it can be conducted in the plant body. It can prevent, eradicate, treat and fumigate rust and powdery mildew. It is effective against various crop diseases such as corn round spot, wheat moire, wheat leaf blight, pineapple black rot, and corn head smut. [0003] Contents of the invention [0004] The present invention proposes a method for preparing the three ketones. The present invention greatly improves the bactericidal ability and has g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D249/08
CPCC07D249/08
Inventor 贾玉林
Owner QINGDAO HAOLITE BIOLOGICAL PESTICIDE
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